JP3241818B2 - Vehicle failure diagnosis device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits a vehicle information indicating a driving state of a vehicle to a large-scale diagnostic device provided in a base station, performs a failure diagnosis, and notifies the vehicle of the result. The present invention relates to a vehicle failure diagnosis device .

[0002]

2. Description of the Related Art Conventionally, vehicle failure diagnosis apparatuses are disclosed in JP-A-56-47805 (self-diagnosis method of an air-fuel efficiency control apparatus) and JP-A-3-31552 (a failure diagnosis apparatus of an air regulator). What is known is. FIG. 8 is a diagram conceptually showing a conventional failure diagnosis device, in which sensors 91 to 93 detect vehicle information of each part of a running vehicle and transmit detection data to a vehicle failure diagnosis device 94 including a microcomputer or the like. To perform fault diagnosis. In the case of a failure, the corresponding warning lights 95 to 97 are turned on to notify the driver. Further, in the device disclosed in Japanese Utility Model Laid-Open Publication No. 63-23664 (vehicle diagnostic device), data of each part of the vehicle is accumulated and stored as history data. The failure content is analyzed by the following.

[0003]

However, when the cause of the failure is complicated, failure diagnosis may not be possible with a microcomputer or the like previously mounted on the vehicle. Increasing the size of the microcomputer mounted on the vehicle for failure diagnosis leads to an increase in cost and cannot be realized. Also, when the cause of the failure is not known on the spot, the vehicle must be brought to a maintenance shop to find and repair the cause. Further, such a conventional failure diagnosis apparatus is mainly intended to find out the cause after a failure has occurred, and does not intend to prevent the failure from occurring. To prevent failures, regular inspections must be performed every six months or once every three years. For that purpose, it is necessary to bring vehicles to maintenance workshops.

SUMMARY OF THE INVENTION An object of the present invention is to diagnose a complicated failure with a large-scale diagnostic device on the base station side, to quickly and accurately perform the failure diagnosis, and to prevent the failure without bringing the failure to a maintenance shop. An object of the present invention is to provide a vehicle failure diagnosis device .

[0005]

[Means for Solving the Problems] FIG.
The present invention will be described in association with 1 (b). Achieve the above purpose
In order to achieve this, the invention according to claim 1 stores and stores vehicle information.
Storage means 101 for performing
Wirelessly transmits vehicle information to the base stations 201 and 202.
Transmission means 102 and base stations 201 and 202
Diagnosis result of the vehicle diagnosed based on the transmitted vehicle information
Receiving means 103 for receiving from the base stations 201 and 202
Applied to a vehicle failure diagnosis device mounted on a vehicle that has
The transmission means 102 is provided with an ignition switch of the vehicle.
Is off, the vehicle information is transmitted to the base stations 201 and 202.
The transmission and reception means 103 transmits the vehicle ignition switch.
Even if the switch is off, the diagnosis result of the vehicle is transmitted to the base station 201,
202 and stored in the storage means 101,
When the ignition switch is turned on, the storage means 101
Output the contents based on the vehicle diagnosis results stored in the
A force means 105 is further provided. Contract
The invention according to claim 2 provides the vehicle failure diagnosis device according to claim 1.
In addition, the receiving means 103 is provided with an ignition switch of the vehicle.
Wireless base stations 201 and 202
Transmission request for vehicle information from the
Transmits the vehicle information to the base stations 201 and 20 in response to the transmission request.
2 is transmitted. The invention of claim 3
Is transmitted in the vehicle failure diagnosis apparatus according to claim 2.
The request is transmitted periodically. Contract
The invention of claim 4 is the invention according to any one of claims 1 to 3.
In the vehicle failure diagnosis device, the receiving unit 103
When there is vehicle abnormality data in the diagnosis result, vehicle abnormality indication
The abnormality information is stored in the storage means 101 and output means 105
Is off when the vehicle's ignition switch is turned on.
The presence or absence of normal information is determined, and if there is abnormal information, the diagnosis result
The content based on is output.

[0006]

According to a first aspect of the present invention, there is provided a vehicle failure diagnosis apparatus for igniting a vehicle.
The vehicle information is transmitted to the base station 2 even if the switch is turned off.
01 and 202. And the base stations 201 and 20
Of the diagnosis performed in step 2 from the base stations 201 and 202
And stored in the storage means 101, and the ignition of the vehicle is performed.
When the power switch is turned on, the
Output the contents based on the diagnosis result. The vehicle of claim 2
The fault diagnosis device operates when the ignition switch of the vehicle is turned off.
Even if there is a vehicle from the base stations 201 and 202 by radio
Receive a request to send information. In response to this transmission request,
Then, the vehicle information is transmitted to the base stations 201 and 202. Contract
The vehicle failure diagnosis device according to claim 3 is a transmission device that transmits periodically.
Receive the request. The vehicle failure diagnosis device according to claim 4 is a vehicle
Vehicle abnormality in the diagnosis result of the vehicle
The abnormality information shown is stored. And the ignition of the vehicle
When the switch is turned on, the presence or absence of abnormal information is determined,
When there is abnormality information, output the contents based on the diagnosis result.
You.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 2 shows an embodiment of a vehicle failure diagnosis system. Reference numeral 1 denotes an information processing unit mainly composed of a microcomputer. The information processing unit 1 includes a display 2, a speaker 3, a buzzer 4, a data The input device 5, the memory 6, the sensor group 7, the output device group 8, and the mobile communication device 9 are connected to each other. The data input device 5 is used to input the time when the engine oil, the oil element, the air cleaner, the battery, and the like have been replaced. The sensor group 7 includes, for example, the following sensors.

(1) A water temperature sensor for detecting engine coolant temperature (2) A temperature sensor for detecting engine oil temperature (3) A speed sensor for detecting engine speed (4) A vehicle speed sensor for detecting vehicle speed (5) Throttle Throttle sensor for detecting opening (6) Knock sensor for detecting engine knock (7) O ₂ sensor for detecting oxygen concentration in exhaust gas (8) Air flow meter for detecting intake air amount (9) Engine oil pressure (10) Brake switch for detecting depression of brake pedal (11) Shift switch for detecting shift position of selector lever (12) Temperature sensor for detecting refrigerant temperature of air conditioner (13) Vertical applied to vehicle body Vertical G to detect acceleration in direction
Sensor (14) Lateral G sensor for detecting lateral acceleration applied to the vehicle body (15) Voltage sensor for detecting battery voltage

The output device group 8 calculates a fuel injection amount based on an engine speed and an intake air amount to control an injection valve, a fuel injection control device based on an engine rotation state, a signal from a knock sensor, and the like. There are an ignition timing control device for controlling the ignition timing, an idle speed control device for controlling the engine speed during idling, and the like. These output signals are also input to the diagnostic processing unit 1.

The memory 6 stores the state of each part of the vehicle detected by the sensor group 7 and the history of the output signal of the output device group 8 for a predetermined period of time (hereinafter, this vehicle information is referred to as a driving state history). The maintenance status (hereinafter, the vehicle information is referred to as a maintenance history) such as an oil change time input from the device 5 is stored.

Base station 10 for wireless communication with mobile communication device 9
Is connected to a processing center 12 via a public telephone line 11, and the processing center 12 is provided with a large-sized diagnosis including a large-sized computer for diagnosing a vehicle failure or performing a periodic diagnosis based on vehicle information transmitted from the vehicle. An apparatus 20 is provided.

The operation of the fault diagnosis system configured as described above will be described with reference to the flowcharts of FIGS. FIG. 3 is a flowchart used on the vehicle side when a failure occurs. For example, it is started when vehicle information from the sensor group 7 indicates an abnormal value. In step S1, the degree of the failure is determined. If the failure is minor, the process proceeds to step S2, in which the content of the failure is converted into voice data and display data, the details of the failure are reported from the speaker 3, and the buzzer 3 is sounded.
Further, the content of the fault is displayed on the display 2.

Here, a minor failure is a failure to the extent that it is not necessary to immediately stop the operation of the vehicle, and a major failure is a failure to the extent that the vehicle needs to be stopped immediately for inspection and repair. Whether it is a minor failure or a major failure is determined by comprehensively considering vehicle information such as the current state of output signals from the sensor group 7 and the output device group 8, the operation state history, the maintenance history, and the like. If advance what is leave or enter the major fault or a minor fault, determining the diagnostic processor 1 with butted and the vehicle information.

If it is determined in step S1 that a serious failure has occurred, the process proceeds to step S3, in which the current output signals of the sensor group 7 and the output device group 8 and data such as the water temperature and engine speed detected by the sensor group 7 are stored. The history of the output signal of the output device group 8, that is, the history of the operation state, and the history of the oil change time, that is, the maintenance history are taken in and converted into data to be wirelessly transmitted to the base station 10. In step S4, the processing center 12 is called, and if it is determined in step S5 that the communication line has been established, the process proceeds to step S6, where the transmission data created in step S3 is transmitted from the mobile communication device 9 to the base station 10
Is transmitted to the processing center 12 via the public telephone line 11.

In steps S7 and S8, the processing center 12
Wait for reception of the result of the analysis in step S9, and if received, disconnect the communication circuit with the processing center 12 in step S9 and proceed to step S10. In step S10, the received analysis result is converted into audio data and display data, the analysis result is notified by voice from the speaker 4, and the analysis result is displayed on the display 2.

FIG. 4 is a flowchart used in the processing center 12 at the time of failure diagnosis, which is started by a call from a vehicle. In step S21, a reception acknowledgment signal notifying that the call has been received is transmitted to the vehicle, and in step S22, reception of vehicle information from the vehicle is awaited. When received, step S
At 23, the cause of the failure is analyzed based on the received data using the large-sized diagnostic device 20, and the analysis result is transmitted to the vehicle side at step S24. Thereafter, the line is disconnected in step S25 to complete the process.

As described above, the abnormality is detected on the vehicle side,
When the abnormality causes a serious failure or when the cause of the failure is unknown, the current output state of the sensor group 7 and the output device group 8, the operation state history, and the maintenance history are sent from the vehicle side to the processing center 12. The data is transmitted and analyzed by a large computer in the processing center 12 to perform failure diagnosis, and the result is transmitted to the vehicle to notify the driver. Therefore, the driver can find out the cause of the failure and repair it while staying at the place.

FIG. 5 is a flowchart showing a routine of a periodic diagnosis process periodically instructed from the processing center 12. When the periodic diagnosis time comes, the periodic diagnosis program shown in FIG. 5 is started, and in step S31, the vehicle is called to request the vehicle to transmit vehicle information for the periodic diagnosis, and in step S32, the communication line is established. Is determined, a request is made in step S33 to transmit the current output state of the sensor group 7 and the output device group 8, the operating state history, and the maintenance history. If it is determined in step S34 that these pieces of vehicle information have been received from the vehicle, in step S35, the processing center 12 analyzes the periodic diagnosis and proceeds to step S3.
At step 6, the analysis result is transmitted to the vehicle. After the transmission, the communication line with the vehicle is disconnected in step S37.

FIG. 6 is a flowchart corresponding to FIG. 5 on the vehicle side at the time of periodic diagnosis. This program is for base station 1
Starting from 0 in response to the call of the periodic diagnosis command. When the ignition switch of the vehicle is not turned on, the information processing unit 1 is in a sleep state, and the power of the information processing unit 11 is turned on by a call from the base station, and the program in FIG. 6 is started.

When the program is started, step S41 is executed.
Sends an incoming confirmation signal back to the base station 10, and waits for a command from the base station 10 in step S42. When a request for transmission of vehicle information for a periodic diagnosis is received, the process proceeds from step S42 to step S43, in which the operation state history and the maintenance history in the memory 6 are read, converted into transmission data, and the vehicle information is transmitted to the base station in step S44. Transmit to the station 10. Then, in steps S45 and S45A, the completion of the reception of the diagnosis result from the base station 10 is waited, and when completed, the analysis result is transferred to the memory 6 and stored in step S46.

If there is abnormal data in the analysis result, the flow advances from step S47 to step S48 to set an abnormal flag. At step S49, it is determined whether or not the ignition switch is on.
In the case of a serious failure, a diagnosis result is immediately output from the speaker 4 in step S51 to alert the driver, and in the case of a minor failure, the communication line is disconnected in step S52 without sound output. Disconnect and exit. If the ignition switch is off, the communication line is disconnected in step S52, and the program ends. When it is determined in step S47 that there is no abnormality, the program ends through step S52.

FIG. 7 shows a failure diagnosis program which is started when the ignition switch is turned on. When the ignition switch is turned on, the presence or absence of an abnormality flag is determined in step S61. If there is no abnormality flag, a message such as "No abnormality is found as a result of the periodic diagnosis" is displayed on the display 4 in step S62. If there is an abnormal flag, step S
In step 63, the diagnostic result is read from the memory 6, converted into voice data in step S64, and notified by voice from the speaker 3, and converted into display data to be displayed on the display 6.
The result of the periodic diagnosis is displayed on the.

The above embodiment is merely an example, and the following modifications are possible. (1) When a failure is detected in the vehicle, the vehicle requests a diagnosis from the processing center or periodically requests a diagnosis from the processing center. Failure diagnosis can be requested. (2) Although the timing of the periodic diagnosis is monitored on the processing center side, it may be monitored by an on-board microcomputer and the vehicle may request the periodic diagnosis spontaneously.

In the above embodiment, the memory 6 is in the storage unit 100, the mobile communication device 9 is in the transmission unit 102 and the reception unit 103, and the sensor group 7 and the diagnosis processing unit 1 are in the detection unit 10
4, the display 2 and the speaker 3 are connected to the output unit 105.
In addition, the large-sized diagnostic devices 20 correspond to the diagnostic means 202, respectively. In addition, the current output signals of the sensor group 7 and the output device group 8, data such as water temperature and engine speed detected by the sensor group 7 and the history of the output signal of the output device group 8 (operation state history), History such as replacement time (maintenance history) corresponds to vehicle information.

[0025]

As described above in detail, according to the present invention, when a vehicle fails, the vehicle information is transmitted to the base station by radio, and the failure is analyzed by a large diagnostic device at the processing center. As described above, it is possible to analyze the details of a failure that could not be determined by a small microcomputer mounted on the vehicle, and to obtain the details of the failure while riding in the vehicle. As a result, it is not necessary to bring the vehicle to the maintenance shop. Further, vehicle information can be periodically transmitted to the processing center in accordance with a command from the diagnostic means to perform periodic diagnosis, so that it is not necessary to bring a vehicle to a maintenance shop every time regular inspection is performed as in the related art.

[Brief description of the drawings]

[Fig. 1] Claim correspondence diagram

FIG. 2 is a diagram showing an overall schematic configuration of a failure diagnosis system according to an embodiment.

FIG. 3 is a flowchart showing a failure diagnosis program started in the vehicle when a failure occurs.

FIG. 4 is a flowchart of a failure analysis program started on the processing center side according to the program of FIG. 3;

FIG. 5 is a flowchart of a periodic diagnosis program periodically started by the processing center.

FIG. 6 is a flowchart of a periodic diagnosis program started on the vehicle side according to the program of FIG. 5;

FIG. 7 is a flowchart for outputting a result of a periodic diagnosis when an ignition switch is turned on.

FIG. 8 is a diagram illustrating an outline of a conventional failure diagnosis device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Diagnostic processing unit 2 Display 3 Speaker 5 Data input device 6 Memory 7 Sensor group 8 Output device group 9 Mobile communication device 10 Base station 12 Processing center 20 Diagnostic device

Claims (4)

(57) [Claims] 1. A storage unit for storing vehicle information, a transmission unit for wirelessly transmitting vehicle information stored in the storage unit to a base station, and a diagnosis based on the vehicle information transmitted from the base station.
Receiving, from the base station, a diagnosis result of the selected vehicle.
Vehicle failure diagnosis device mounted on a vehicle, comprising:
The transmission means is provided when the ignition switch of the vehicle is turned off.
Even if there is, the vehicle information is transmitted to the base station, and the receiving means is turned off when an ignition switch of the vehicle is turned off.
Even if there is a diagnosis result of the vehicle received from the base station
When the ignition switch of the vehicle is turned on , the information is stored in the storage means.
The contents based on the diagnosis result of the vehicle stored in the storage means
A vehicle further comprising output means for outputting.
Failure diagnosis device . 2. The vehicle failure diagnosis apparatus according to claim 1, wherein
The receiving means is provided when the ignition switch of the vehicle is turned off.
Even if the transmission of the vehicle information from the base station by radio
Receiving the request, the transmitting means responding to the transmission request, the vehicle information
Vehicle diagnostics, comprising transmitting to the base station
Equipment . 3. A vehicle failure diagnosis apparatus according to claim 2, wherein
Te, the transmission request, and wherein the periodically transmitted
Vehicle failure diagnosis device . 4. The vehicle according to claim 1, wherein :
In the failure diagnosis device, the receiving unit may include a vehicle abnormality data in the vehicle diagnosis result.
When there is data, the abnormality information indicating the abnormality of the vehicle is stored in the storage means.
The output means is provided when the ignition switch of the vehicle is turned on.
When, to determine the presence or absence of the abnormality information, abnormality information there
Output a content based on the diagnosis result.
Vehicle failure diagnosis device .